Loop and string puzzle



FIG. 1 is a front perspective view of a loop and string puzzle showing my new design, the string in broken lines for illustrative purposes only;

FIG. 2 is a frontal elevation view of the embodiment of FIG. 1;

FIG. 3 is a side elevation view of the embodiment of FIG. 1;

FIG. 4 is a top plan view of the embodiment of FIG. 1; and,

FIG. 5 is a bottom plan view of the embodiment of FIG. 1. 

The ornamental design for loop and string puzzle, as shown. 